SEN0177

SEN0177 Datasheet

PM2.5 laser dust sensor SKU SEN0177

Part	Datasheet
SEN0177	SEN0177 (pdf)

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PM2.5 laser dust sensor SKU SEN0177 Contents • 1 Introduction • 2 How it works? • 3 Specification • 4 Connection • 5 Tutorial Connection Diagram Sample Code Result • 6 Communication protocol • 7 Dimensions Introduction PM2.5 laser dust sensor is a digital universal particle concentration can be used to obtain the number of suspended particulate matter in a unit volume of air within to 10 microns, namely the concentration of particulate matter, and output with digital interface, also can output quality data of per particle. The sensors can be embedded in a variety of concentrations of environment-related instruments suspended particulate matter in the air ,to provide timely and accurate concentration data. How it works? The sensor uses a laser scattering theory. And namely the scattering of laser irradiation in the air suspended particles, while collecting the scattered light at a specific angle, to obtain the scattering intensity versus with time curve. After the microprocessor data collection, get the relationship between the time domain and frequency domain by Fourier transform, and then through a series of complex algorithms to obtain the number of particles in the equivalent particle size and volume units of different size. Each functional block diagram of the sensor portion as shown: sensor structure diagram Specification Basic Operating voltage ~ 5.05V Quick response Maximum electric current 120mA Standard serial input word output Measuring pm diameter Second-order multi-point calibration Measuring pm ug/m3 Standby current uA Response time s curve The minimum size of micron resolution Operating temperature range: -20 ~ 50C Operating humidity range 0 ~ 99% RH Maximum size 65 x 42 x 23 mm MTBF >= 5 years Power supply quality requirements: Voltage ripple less than 100mV. The power supply voltage stability ~ 5.05V. Power supply more than 1W The upper and lower electric voltage surge is less than 50% of the system power supply voltage. Connection Sensor Arduino Function Pin 1 VCC Positive Power Pin 2 GND Negative Power Pin 3 SET Mode setting More hereof later Pin 4 RXD receive serial port pin 3.3V level Pin 5 TXD Transferring serial port pin 3.3V level Pin 6 RESET Pin 7/ 8 NC NUll NOTE: • SET = 1, the module works in continuous sampling mode, it will upload the sample data after the end of each sampling. The sampling response time is 1S SET = 0, the module enters a low-power standby mode. • RESET leave it empty is OK.

PDF Datasheet Preview

PM2.5 laser dust sensor SKU SEN0177

Contents
• 1 Introduction
• 2 How it works?
• 3 Specification
• 4 Connection
• 5 Tutorial

Connection Diagram Sample Code Result
• 6 Communication protocol
• 7 Dimensions

Introduction

PM2.5 laser dust sensor is a digital universal particle concentration can be used to obtain the number of suspended particulate matter in a unit volume of air within to 10 microns, namely the concentration of particulate matter, and output with digital interface, also can output quality data of per particle. The sensors can be embedded in a variety of concentrations of environment-related instruments suspended particulate matter in the air ,to provide timely and accurate concentration data.

How it works?

The sensor uses a laser scattering theory. And namely the scattering of laser irradiation in the air suspended particles, while collecting the scattered light at a specific angle, to obtain the scattering intensity versus with time curve. After the microprocessor data collection, get the relationship between the time domain and frequency domain by Fourier transform, and then through a series of complex algorithms to obtain the number of particles in the equivalent particle size and volume units of different size. Each functional block diagram of the sensor portion as shown:
sensor structure diagram

Specification

Basic

Operating voltage ~ 5.05V

Quick response

Maximum electric current 120mA

Standard serial input word output

Measuring pm diameter Second-order multi-point calibration

Measuring pm ug/m3

Standby current uA Response time s
curve The minimum size of micron resolution

Operating temperature range: -20 ~ 50C

Operating humidity range 0 ~ 99% RH

Maximum size 65 x 42 x 23 mm

MTBF >= 5 years

Power supply quality requirements:

Voltage ripple less than 100mV. The power supply voltage stability ~ 5.05V. Power supply more than 1W The upper and lower electric voltage surge is less than 50% of the system power supply voltage.

Connection

Sensor Arduino Function

Pin 1 VCC Positive Power

Pin 2 GND Negative Power

Pin 3 SET

Mode setting More hereof later

Pin 4 RXD
receive serial port pin 3.3V level

Pin 5 TXD

Transferring serial port pin 3.3V level

Pin 6 RESET

Pin 7/ 8 NC

NUll

NOTE:
• SET = 1, the module works in continuous sampling mode, it will upload the sample data after the end of each sampling. The sampling response time is 1S SET = 0, the module enters a low-power standby mode.
• RESET leave it empty is OK.

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Datasheet ID: SEN0177 509093